package Homeworks.HOMEWORK0301;

import java.util.Scanner;

public class Work2 {
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        for(int i=2;i<num;i++){
            if(su(i)+su(num-i)==0){
                System.out.println("输入="+i+"+"+(num-i));
                break;
            }
        }
    }
    public static int su(int a){
        int i=2;
        int j=0;
        for(;i<a;i++)
        {
            if(a%i==0) {
                j=1;
            break;
            }
        }
        return j;
    }

}
